Apparatus for use in the manufacture of laminated glass



June'lO, 1930. l G. w. KRETZSCHMA 1,762,722

APARATUS FOR USE IN THE MANUFACTURE OF LAMINATED GLASS Filed Aug. 28, 1928 2 Sheets-Sheet 1 June l0, 1930. G. w. KRETZSCHMAR v 1,752,722

APPARATUS FOR USE IN THE MANUFACTURE OF LAMINTED GLASS Filed Aug. 28, 1928 2 Sheets-Sheet 2 Patented June 1.0, 1930 UNITED 1 STA TES PATENT OFFICE l GEORGE W. KRETZSCHMAR, F GARFIELD, NEW JERSEY, ASSIGNOR TO TRIPLEX SAFETY GLASS COMPANY OF .NORTH AMERICA,

DELAWAREy 0F NEW YORK, N. Y., A CORPORATION OF APPARATUS FOR USE IN THE MANUFACTURE OF LAMINATEDGLASS Application linea August '28, 192s. serial No. 302,476.

In the manufacture of laminated glass, in which` a sheet of Celluloid or other non-fran- .giblematerial is placed between two-sheets of glass, withsuch irm adhesion that if the 5 glassis broken by a blow the splinters of glass will not leave ythe interposed sheet of Celluloid or like material, it hasbeen found desirable toseal the edges of the glassso ythat the celluloid shall be protected againstV the penetration of air or gases or moisture. Such sealing' is 'best accomplished by filling 'j with -al suitable. sealing compound a thin space left at the edge of the sheet of laminated glass by removal or omission of the l5 Celluloid from a narrow strip between the Asheets of glass. lBy reason of the methods followed in the preparation and assembling of the glass and Celluloid and the thinness ofthe space left betweenthe two sheets of glass at the edge, the proper Cleaning out of the thin space left at the edge, preparatory to' the introduction of the sealing compound, has beenua matter of much dificulty and has required hitherto an amount of manual labor '25 which represents a substantial element in the cost of production of the completed article.

It hasbeen the object of this invention to provide means whereby the cleaning out' of this narrow space between the two. sheets of glass can be effected thoroughly and quickly yand in the vdevelopment of 'the invention it has beenfound that the desired result can be accomplished by the use of a thin, endless band scraper which is properly supported and operated and to which .the laminated sheet of glass can be presented for actionby the endless band scraper. 4 i The invention will be more fully explained. hereinafter with reference to the accompanying drawings in which it is illustrated as embodied in the suitable formof apparatus andy in which:

Figure 1 is a top View of such an appz.

provided with a rubber pad b1 on which the sheet o f laminated glass may rest, and, at itsforward edge, with stops o2 to limit the forward movement of the. sheet of glass. As

a convenient means for electing the gradual i forward movement of the glass toward the scraper the table b is shown as provided near its ends with racks '0,' which are engaged by gears d on a` shaft d1 suitably mounted in the frame ofthe machine and provided, as at d2, with an operating handle. In order that the glass may be held firmly on the table withoutdanger of breakage there is provided a presser e which has a contact foot 'e1 and is supported'by arms e2 of a shaft e3. The presser is conveniently operated through connection of an arm e* on the shaft e3 to the piston rod f 'of a double acting presser cylinder f1, conveniently controlled b a threeway valve f2, air under pressure being supplied througha pipe f* from any convenient source.

The glass to be operated upon, as shown in somewhat exaggerated form in Figure 3, consists of two sheets g of glass and an interposed sheet g1 of vCelluloid to which the glass is caused to adhere strongly. For the purpose of sealing the edge of the laminated sheet a thin, narrow space g2, no more than a few hundredths of an inch in thickness, and perhaps one-quarter of an inch in width, is cleaned of all Celluloid and any adhesives which may be used all about the edge of the laminated sheet. i

The cleaning of the space at the ed e of the glass is accomplished by an endless and scraper h, preferably serrated at its forward edge and i supported at each end by band wheels and 1, to one of which power may be applied, as indicated at 2, while the other is adjustably mounted' on the frame 0f the machine, as indicated at 3, in order that the band may be maintained under proper tenand cleans out the space to the required Width.

sion. Grooved Wheels [c mounted on a bar 701, serve to support and guide the band so that it shall be maintained in proper position. i

. In the operation of the apparatus the sheet i of laminated glass is laid upon the table b upon which it is held by the presser meehanism which is itself mounted upon the table,

as by standards b3, b4, and is advanced toward the band Cleaner, which, having been set in motion, enters between the two sheets of glass Il claim .as my invention:

' An apparatus for use in preparing the edges of laminated glass for sealing compris ing an endless, traveling band Cleaner, means to support the band cleaner, a movable supporting table to receive the' sheet of laminated glass, a presser mounted on the table to press the glass down on the table,means to actuate the same mounted on the tableg and means to move the table and the presser toward the band cleaner.

This specification signed this 15th day 'of August A. D. 1928.

GEORGE W. KRETZSCHMAR.

' anser/'a2I 

